Steller nursery

[nexium]

Does this seem correct? Suppose a molecular cloud = steller nursery has a radius of 100 light years. Stars that form early near the center will produce a steller wind of perhaps 1% of the speed of light out to their heliopause, which will typically be less than one light year. I think the ion density is sharply reduced beyond the heliopause, but molecular clouds may be different.<br />In any case, we may be looking at an average expansion of the molecular cloud of a millionth part of the speed of light, so it takes about a billion years for the cloud to be scattered widely, even with frequent stellar births. Solar wind from stars near the edge of the molecular cloud significantly compact the cloud as well as scattering it.<br />Closely spaced stars rarely collide, but near misses occur, with the less massive star being accelerated by sling shot manuver. The new speed and direction is often sufficient to take the star out of the reminent of the molecular cloud in a few billion years. Neil<br />

 

[3488]

I think that is true.<br /><br />There are at least three known runaway stars from the Orion Nebula (51 Arietis, AE Aurigae & <br />Mu Columbae, think I am correct in those three).<br /><br />they might had been accelerated by a massive forth star that nova, but I fail<br />to see how that would cause three stars to race away from the nebula.<br /><br />Ypur theory of slingshot sounds more plausible. Perhaps they were a trinary system<br />that did approach a forth massive star & got broken up & chucked out by the encounter.<br /><br />Andrew Brown.<br /><br /> <div class="Discussion_UserSignature"> <p><font color="#000080">"I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before".</font> <em><strong><font color="#000000">Linda Morabito </font></strong><font color="#800000">on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.</font></em></p><p><font size="1" color="#000080">http://www.launchphotography.com/</font><br /><br /><font size="1" color="#000080">http://anthmartian.googlepages.com/thisislandearth</font></p><p><font size="1" color="#000080">http://web.me.com/meridianijournal</font></p> </div>